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Modification of Asphalt Oxidation and Binders with Polymers

a technology of oxidation and binders, which is applied in the direction of climate sustainability, solid waste management, sustainable waste treatment, etc., can solve the problems of not being used, paving asphalt is often made harder to reduce penetration, and the oxidation process is both timely and costly. achieve the effect of improving the performance grade of the paving asphalt binder

Inactive Publication Date: 2021-03-25
GREENMANTRA RECYCLING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method of improving the performance grade of paving asphalt binder by adding a polymeric wax to it. This can increase the softening point of the asphalt, decrease the penetration depth of the asphalt, and reduce the time required for asphalt oxidation. The addition of the wax can also increase the high service temperature of the asphalt formulation. Overall, the method can make the paving asphalt binder perform better in its various applications.

Problems solved by technology

Paving asphalt is often made harder to reduce penetration from heavy forces, such as large trucks.
However, the oxidation process is both timely and costly.
However, GTR is often not used due to its cross-linked nature which can increase asphalt viscosity and make the asphalt more difficult to process.
In addition, the stability of GTR in asphalt can be poor, leading to separation or settling of the rubber.

Method used

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  • Modification of Asphalt Oxidation and Binders with Polymers
  • Modification of Asphalt Oxidation and Binders with Polymers
  • Modification of Asphalt Oxidation and Binders with Polymers

Examples

Experimental program
Comparison scheme
Effect test

example 1

of Polyethylene Waxes to Mopping Asphalt

[0054]In a first example, effects of the addition of a wax formed via depolymerization of polyethylene were observed, As set forth in Tables 1-3, unmodified mopping asphalt served as a control.

TABLE 1Sample Data ComponentsIngredientGrade / TypeSourceAsphalt Type IVMopping asphaltMid-StatesHV Polyethylene WaxAW115HVGreenMantraLV Polyethylene WaxAW115LVGreenMantra

TABLE 2Asphalt Components as Percentage of Total WeightFormulationControl IABCDAsphalt Type IV10097959795AW115HV03500AW155LV00035

TABLE 3Asphalt PropertiesFormulationControl IABCDPropertiesSoftening Point103117124114123(° C.)Penetration at151111121225° C. (dmm)Viscosity at25527127826827175 cps (° C.)Flashpoint by280274266276268Cleveland OpenCup (° C.)Ductility (cm)3.182.861.912.541.91

[0055]Asphalt blends were prepared by mixing oxidized mopping asphalt with AW115HV or AW115LV wax at either 3% or 5% by weight. Mixing was performed by low shear mixers at elevated temperatures.

[0056]As set fo...

example 2

of Polypropylene Wax to Asphalt Binder

[0085]In at least some embodiments, the wax is incorporated into asphalt used in paving asphalts, crack fillers, adhesives and other products for waterproofing and joint sealing. In at least some embodiments, the wax can be incorporated into oxidized asphalt such as coating-grade asphalt and mopping-grade asphalt. In other embodiments, the wax can be incorporated into non-oxidized asphalt such as saturant-grade asphalt.

[0086]In some embodiments, waxes can be used to modify paving asphalt binder. Paving asphalt binder can employ a variety of waxes, including those with melt points between and inclusive of 60-170° Celsius, and viscosities between and inclusive of 5-3000 cps. In some preferred embodiments, the wax(es) employed have melt points between and inclusive of 110-170° C. and / or viscosities between, and including, 15-1000 cps.

[0087]In some preferred embodiments, a polypropylene wax can be used to improve performance grade of paving asphalt ...

example 3

of Wax to Asphalt Binder

[0108]

TABLE 7Sample Data ComponentsIngredientGrade / TypeSourceAsphalt BinderPaving Grade AsphaltCommercial Stock(PG64-22)Polyethylene WaxA115 waxGreenMantra (Applicant)Polyethylene WaxA120 waxGreenMantra (Applicant)Polyethylene WaxA125 waxGreenMantra (Applicant)Polypropylene WaxA155 waxGreenMantra (Applicant)

TABLE 8Asphalt Components as Percentage of Total WeightFormulationControl IIIIJKLPG64-2210097979797A115 wax03000A120 wax00300A125 wax00030A155 wax00003

[0109]Asphalt formulations were prepared by mixing asphalt binder with the various waxes.

[0110]As set forth in Table 8, Control II consisted of an unmodified asphalt binder.

[0111]Asphalt Formulation I consisted of 97% by weight of asphalt binder and 3% by weight of A115 wax.

[0112]Asphalt Formulation J consisted of 97% by weight of asphalt binder and 3% by weight of A120 wax.

[0113]Asphalt Formulation K consisted of 97% by weight of asphalt binder and 3% by weight of A125 wax.

[0114]Asphalt Formulation L consis...

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Abstract

Asphalt can be modified by polymers, oligomers, and waxes made from polymeric material. The addition of polymer, oligomer, or wax can increase the softening point of the asphalt, decrease the penetration of the asphalt, and / or shorten the oxidation of the asphalt. In some embodiments, polymer, oligomer, or wax is added to an oxidized asphalt. The polymer, oligomer, or wax can be made by catalytic depolymerization and / or thermal degradation of polymeric material. The polymeric material can be polystyrene, polypropylene, polyethylene, a combination of polypropylene and polyethylene or recycled plastics. In some embodiments, addition of the polymer, oligomer, or wax improves the performance grade of a paving asphalt binder alone or in combination with other modifiers such as ground tire rubber and polymers. The addition of wax can increase the high service temperature of the asphalt binder.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of International Application No. PCT / CA2019 / 050762 having an international filing date of May 9, 2019 entitled “Modification of Asphalt Oxidation and Binders with Polymers”. The '762 application is related to and claims priority benefits from U.S. Provisional Application Ser. No. 62 / 679,150 filed on Jun. 1, 2018 entitled “Modification of Asphalt Oxidation with Waxes Derived from Depolymerization of Plastic”. The '762 application is also related to and claims priority benefits from U.S. Provisional Application Ser. No. 62 / 681,344 filed on Jun. 6, 2018 entitled “Modification of Asphalt Binders with Waxes to Improve Performance Grade”.[0002]The '762, '150 and '344 applications are hereby incorporated by reference herein in their entireties.FIELD OF THE INVENTION[0003]The present invention relates to a method of employing polymers, oligomers, and waxes, from now on just referred to as waxes, as additives in ...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/26C04B18/22
CPCC04B26/26C04B18/22C04B24/2611C08L91/06C08L95/00C08L25/06Y02W30/91Y02W30/62C04B24/2676
Inventor DI MONDO, DOMENICALMEY, JOHN
Owner GREENMANTRA RECYCLING TECH
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